Question

A glass flask is filled up to a mark with 50 cc of mercury at 18ºc. If the flask and contents are heated to 38ºc, how much mercury will be above the mark ? (α for glass is 9 × 10–6/ºc and coefficient of real expansion of mercury is 180 × 10–6/ºc)

Answer 1

The relative expansion = 180*10^-6 - 3 * 9*10^-6

Then multiply the relative expansion by the temperature difference of 20K